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Volume 26 (2000)
- Issue 6 Pages 203-
- Issue 5 Pages 163-
- Issue 4 Pages 121-
- Issue 3 Pages 83-
- Issue 2 Pages 37-
- Issue 1 Pages 1-
Volume 26, Issue 2
Displaying 1-8 of 8 articles from this issue
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Itaru NISHIZAKI2000 Volume 26 Issue 2 Pages 37-42
Published: March 15, 2000
Released on J-STAGE: August 11, 2009
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Shinji OGIHARA, Youichi KIMURA, Nobuo TAKEDA, Akira KOBAYASHI2000 Volume 26 Issue 2 Pages 43-50
Published: March 15, 2000
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSA single fiber fragmentation test is performed to investigate the effects of fiber surface treatment on fiber break behavior. Single glass fiber/epoxy composites with five different surface treatments are loaded in tension in the fiber direction. In-situ observation of the fiber fragmentation process is conducted by using an optical microscope equipped with a loading device. Fiber break density is measured as a function of applied strain. The microscopic failure around fiber breaks is also observed. It is seen that the fiber break behavior and the microscopic failure around fiber breaks are different with the fiber surface treatments. To interpret the experimental data, the authors' analysis of the stress transfer between the fiber and the matrix in a single fiber reinforced composite with fiber breaks is used. The analysis is based on a concentric cylinder model considering an interphase layer between the fiber and the matrix. By using the stress transfer analysis, fiber break density as a function of applied strain is predicted. By comparing between the experimental results and the analytical prediction, the validity of the analytical prediction is discussed.View full abstractDownload PDF (3325K) -
Hiroaki MACHIDA, Tadao SHIMIZU, Kaoru IGARASHI2000 Volume 26 Issue 2 Pages 51-57
Published: March 15, 2000
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSThe silicate glass fiber cloth was preliminary dipped in cobalt (II) nitrate 6-hydrate alcoholic solution. Carbon whisker was formed on the pre-treated silicate glass fiber cloth through the reactoin of benzenesulfonic acid monohydrate, ethanol, and N2 gas mixture. At the reaction temperature above 1, 100°C, the generated carbon whiskers with diameter of 1-3μm linked the silicate glass fibers. At the temperature below 1, 100°C, the carbon whisker grown was 0.1μm in diameter and 2-200μm long. Tensile strength of the specimens carbonized at 1, 050°C was about 5.0 MPa and the highest strength of 13.2 MPa was obtained on the specimens carbonized at 1, 100°C. It was also found that the oxidation of the specimen started at the lower temperature with increasing amount of absorbed cobalt ion.View full abstractDownload PDF (6256K) -
Atsushi WADA, Hiroshi FUKUDA2000 Volume 26 Issue 2 Pages 58-64
Published: March 15, 2000
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSFiber reinforced plastics are essentially heterogeneous materials where plastic matrix is reinforced by fibers. Therefore, it is important to know the properties of fiber/matrix interaction in addition to the properties of fiber and matrix themselves. To measure the fiber/matrix adhesive strength, various kinds of tests such as fiber pull-out, fragmentation, microbond, etc. have so far been tried. According to our previous study, the interfacial shearing strength by means of the microbond test was a little smaller than that of the fragmentation test, which coincided with the other researchers' result. In the present study, we tried a microbond test at four kinds of condition to establish reliable microbond test method. They are the combination of sharp or blunt microvise and two widths of microvises. We made clear that the interfacial shearing strength was different for the shape and the width of the microvise and the best method of the microbond test was to use a blunt microvise and to keep a broad width of microvise. We also made clear that the microbond test should be conducted using large microdrops to get real shearing strength. We also carried out a finite element analysis to understand the stress distribution at the fiber/matrix interface and the numerical results qualitatively coincided with the experimental result.View full abstractDownload PDF (7770K) -
Naoki TOMOMITSU, Norio HIRAYAMA, Naoshi NANJYO2000 Volume 26 Issue 2 Pages 65-68
Published: March 15, 2000
Released on J-STAGE: February 08, 2010
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Akira NISHIMURA, Kiyoshi HOMMA, Ikuo HORIBE2000 Volume 26 Issue 2 Pages 69-71
Published: March 15, 2000
Released on J-STAGE: August 11, 2009
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Shigenori KABASHIMA, Tsuyoshi OZAKI2000 Volume 26 Issue 2 Pages 72-75
Published: March 15, 2000
Released on J-STAGE: August 11, 2009
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Yoshiharu WAKU, Narihito NAKAGAWA, Hideki OHTSUBO2000 Volume 26 Issue 2 Pages 76-79
Published: March 15, 2000
Released on J-STAGE: August 11, 2009
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